In-vehicle ppb scale low-concentration odor level assessment method based on handheld electronic nose

Abstract

The invention relates to an in-vehicle ppb scale low-concentration odor level assessment method based on a handheld electronic nose. The method comprises the following steps of designing a gathering module based on an adsorbent adsorption and desorption principle, integrating the gathering module with the electronic nose to form an electronic nose device; gathering in-vehicle gases with differenttypes to serve as gases to be detected; manufacturing an odor level label for the gases to be detected; gathering and detecting the gases to be detected; assessing low-concentration in-vehicle odor: firstly performing denoising, filtering and normalized pretreatment operations on the detection data of the electronic noise, then acquiring a plurality of feature values of each sensor response curve,wherein each data set comprises multiple feature values and corresponding odor level labels; and building a low-concentration in-vehicle odor assessment model via a machine learning method.

Description

technical field [0001] The invention relates to a hand-held electronic nose with enrichment function and an evaluation method for low-concentration mixed odor levels in cars. Background technique [0002] With the improvement of people's living standards and the rapid development of the automobile industry, more and more families have their own cars. However, the rapid expansion of domestic car production capacity has also brought some problems. In addition to problems such as burning engine oil and broken shafts, the peculiar smell inside the car has also begun to attract the attention of consumers and relevant quality inspection departments. The main components of car odor are volatile organic compounds (volatile organic compounds, VOCs). Odor emitted from the interior of a new car is potentially harmful to human health. Therefore, the evaluation method of vehicle interior odor level based on olfactory instruments such as electronic nose has important research value and ...

AI Technical Summary

Problems solved by technology

The gas concentration device introduced in this patent and the electronic nose independently developed by the laboratory are used to distinguish pathogenic bacteria, but it has not been applied to the field of odor detection in cars, nor has it introduced related odor evaluation methods

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